2020.01.13-2019.01.19

1月14日(火)13:30~15:00  太陽系小天体セミナー          南棟2階会議室 
Jan 14 Tue      Solar System Minor Body Seminar  Conference Room, South Bldg.2F    

1月14日(火)14:00~    ALMA-J セミナー       アルマ棟 1階 102
Jan 14 Tue             ALMA-J Seminar   ALMA building Room 102

1月15日(水)10:30 -12:00  総研大コロキウム      講義室
Jan 15 Wed         SOKENDAI colloquium    Lecture Room 

1月17日(金)16:00~17:00  談話会                すばる棟大セミナー室
Jan 17 Fri         NAOJ Seminar   Large Seminar Room, Subaru Bldg.

詳細は以下をご覧下さい。

1月14日(火)

キャンパス
三鷹
セミナー名
太陽系小天体セミナー
定例・臨時の別
定例
日時
1月14日(火曜日)13時30分~15時
場所
南棟2階会議室

連絡先
 名前:渡部潤一
備考
テレビ会議またはスカイプによる参加も可

1月14日(火)

Campus
Mitaka
Seminar
ALMA-J Seminar
Regularly Scheduled/Sporadic
Sporadic
Date and time
Jan 14, 2pm
Place
ALMA building Room 102
Speaker
Chat Hull
Affiliation
NAOJ
Title
Star formation, polarization, and magnetic fields in the ALMA era
Abstract
New ALMA polarization observations continue to both expand and confound our understanding of the role played by the magnetic field in low-mass star formation. The sample of very young, Class 0 protostellar sources observed with high resolution and high sensitivity with ALMA is now large enough that we are beginning to see the same surprising features in multiple sources. The first of these are magnetic field morphologies that beautifully trace the outflow cavity walls in several objects, suggesting that the outflow has shaped the magnetic field. The polarization along the cavities is strongly enhanced, and in some cases is co-located with emission from UV-tracing molecules, suggesting that the origin of the enhanced polarization is the strong irradiation of the outflow cavities. The second, more puzzling set of features are thin structures with well organized magnetic fields that are not associated with outflow cavity walls, and yet have high polarization fractions in spite of being deeply embedded and far from any obvious source of the photons necessary to align the grains. I will close by discussing recent ALMA observations of polarization toward much more evolved, Class II protoplanetary disks. In the case of my work on IM Lup (one of these disks): consistent with some (but not all!) polarization observations of other disks, the polarization at Bands 6 and 7 (1.3 mm and 850 microns) appears to be due to scattering by dust grains, thus complicating the search for magnetic fields in these sources. While on one hand all of these results challenge our understanding of both magnetic grain-alignment and grain growth, they also have the potential to open up new windows into the dust-grain properties and radiation environments in young star-forming sources.

Facilitator
-Name:Yu-Ting Wu
Comment
the talk will be given in English

1月15日(水)

Campus
Mitaka
Seminar
SOKENDAI colloquium
Regularly Scheduled/Sporadic
Regular
Date and time
January 15th, 2020, 10:30-12:00
Place
Lecture Room

Speaker
Yuzhu Cui
Affiliation
SOKENDAI 5th year (D3) (Supervisor: Mareki Honma, Kazuhiro Hada, Hiroshi Nagai)
Title
Variation of M87 jet base revealed by EAVN 2017-2019 campaign.
Speaker
Yongming Liang
Affiliation
SOKENDAI 3rd year (D1) (Supervisor: Nobunari Kashikawa,Masayuki Tanaka, Yuichi Matsuda, Yutaka Komiyama)
Title
Correlation between galaxies and IGM neutral hydrogen at z~2.2 mapped by Subaru/HSC

Facilitator
-Name: Kei Ito

1月17日(金)

Campus
Mitaka
Seminar
NAOJ seminar
Regularly Scheduled/Sporadic
Scheduled
Date and time
Friday, Jan 17 16:00-17:00
Place
Large Seminar Room
Speaker
Eiichi Egami
Affiliation
Member of the JWST/NIRCam Instrument & Science team, Steward Observatory, University of Arizona
Title
The James Webb Space Telescope (JWST), scheduled for launch in 2021, is NASA’s next flagship space observatory, succeeding the Hubble Space Telescope (HST) launched ~30 years ago. Equipped with a 6.5-meter primary mirror (segmented) and four sensitive and versatile instruments covering ~1-30 microns (NIRCam, NIRSpec, MIRI, and NIRISS), JWST is expected to revolutionize our understanding of the Universe near and far, from detailed studies of exoplanets to discoveries of first galaxies. JWST is currently undergoing the last series of testing and assembly at the Northrop-Grumman facility in Los Angeles, and will be shipped to the launch site next year (Kourou, French Guiana). In this talk, I will present an overview and the current status of the JWST project, together with a back-stage view of various project activities past and present, such as the ground testing at NASA’s Goddard Space Flight Center (GSFC) and Johnson Space Center (JSC) as well as the commissioning rehearsals at the Space Telescope Science Institute (STScI). On the science side, this talk will try to cover a large variety of topics targeted by JWST, with a special emphasis on one large (~800 hours) extragalactic GTO program, the JWST Advanced Deep Extragalactic Survey (JADES). Finally, I will describe some key issues related to the JWST Cycle-1 proposal preparation and evaluation, with the hope of motivating interested researchers in Japan to take advantage of this once-in-a-lifetime opportunity.

Facilitator
-Name:Nakaya, Hidehiko

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